Metal-working machine.



- R. H. SMITH.

METAL WORKING MACHINE. APPLICATION FILED SEPT-13.1911. IL ,5@? @52. Patentedfiep 4, 1917.

3 SHEETS-SHEET 1.

rWifnQ 43,552

R. H. SMITH.

METAL WORKING MACHINE.

APPLICATION FILED SEPT. 13. 1911.

11.. $39 520 Patented Sept. 4, 191?.

3 SHEETS'SHEET 2.

R. H. SMITH. METAL WORKING MACHINE. APPLICATION mu) SEPT. 13. 1911.

l gag gg, Patented Eept. 4, 1917.

a sHEETS-sHEET 3.

BOY H. SMITH, OF CLEVELAND, OHIO.

METAL-WORKING- MACI-IINE.

Application filed September 13, 1911.

To all whom it may concern:

Be it known that I, ROY H. SMITH, a citizen of the United States, residing at Cleveland, in the county of Cuyahoga and State of Ohio, have invented a certain new and useful Improvement in Metal-Working Machines, of which the following is a full, clear, and exact description.

This invention relates to metal working machines of the type wherein stock fed into the machine is cut into suitable lengths and headed, trimmed or otherwise acted upon by tools.

In various kinds of metal working machines, of this general type, the stock is cut into lengths by means of a blade or shear plate carried by a reciprocating holder which is moved back and forth at right angles to the direction of feed of the stock by means of a cam, the latter being usually carried by a reciprocating slide and engaging ,a roller mounted on the holder for the cutter proper. This roller is arranged on one side of the holder, and to provide adjustment for wear of the cutter, said roller is carried by a block which is arranged in a slot of the holder. and is normally held in position in the slot and is adapted for adjustment lengthwise thereof by means of an adjustable screw.

This construction for cutting the stock is very satisfactory as long as the machine is operating on small stock, say or 2; lnch in diameter, but is unsuitable and defective when the stock is comparatively large, say a or 1 inch in diameter or thickness. As the size of the stock is increased, the pressure transmitted between the cam and roller must of course be increased, and as it is transmitted not in line with the axis of the holder or cutter, it has a certain leverage dependent substantially upon the distance of the center of the rollerfrom the center of the holder, and as a result, the cam tends to turn or rock the holder in its support or guideway. When thick stock is being cut, the holder is rocked to an extent such that a part of the cutter is swung away from the i die block, so that clean shearing of the stock is impossible.

A further objectionable feature of this common form of cutting mechanism wherein the roller is supported from an adjustable part mounted in a slot of the holder, lies in the fact that it is not sufficiently strong and rigid to transmit the enormous pressurere- Specification of Letters Patent.

Patented Sept. a, 19W.

fierial No. 649,157.

quired to cut stock of the larger thicknesses above stated.

The object of the present invention is to provide a stock cutting mechanism for metal working machines which is designed espe cially for cutting stock of the larger sizes without any liability of imparting a rocking movement to the holder or of bending or buckling the latter. Further, the invention aims to provide such a relative arrangement and construction of the parts including the cam, roller, and cutter holder, that, not only are the above advantages attained, but the roller is amply supported and held firmly without danger of breakage or displacement, while at the same time, the adjustments to provide for wear may be had.

The above and other objects are accomlished by my invention which may be riefly summarized as consisting in certain novel details of construction and combinations and arrangements of parts which will be described in the specification and set forth in the appended claims.

In the drawings, Figure 1 is a plan view of a metal working machine equipped with my improved stock cutting mechanism; Fig. 2 is a side view of the same with portions broken away and other parts removed; Fig. 3 is an enlarged horizontal sectional view showing particularly the stock cutting mech anism; Fig. 4: is a transverse sectional view of the same along the line 4r-4: of Fig. 3, looking in the direction indicated by the arrows; and Fig. 5 is a sectional view of a portion of the holder showing the support for two rollers which are engaged by cams to shift the holder.

Referring now to the figures of the drawing, 10 represents the horizontal bed or frame of the machine, which may be used for a variety of purposes, such as for forming bolt or rivet blanks and the like, the only essential part of the machine being the stock cutting mechanism for cutting the stock which is fed into the machine, into suitable lengths, which may then be operated on by tools of any desired form.

At the forward part of the machine is a crank shaft 11 which is connected by means of a connecting rod 12 to a horizontally moving slide or plunger 13, suitably guided in the frame and provided at its forward end with a tool 14 adapted to operate on the stock after the latter has been cut into the required lengths by the stock cutting mechanism to be referred to presently. Just-forward of the tool 14: is a die block 15, which may be provided with a suitable die, the particular shape or purpose of which is. imma- The stock 1s adapted to be fedthrough an opening 16 extending through terial.

the end of the machine and through the die block, and is adapted to be cut when projected beyond the face of the dieblock.

At one side of the frame 10 is a frame extension 17 in which is slidably mounted By referring particularly to Fig. 1, it will be seen that the slide 18 has two cams designated 21 and 22, the former having a cam face which is considerably wider than the latter, and being arranged above the cam 22. The cutting of the stock is accomplished by means of a cutter or cutting blade 23 secured to a holder Qt, which is designed to be shifted back and forth at right angles to the stock and'to the direction of movement. of the slide or plunger 13 and of the cam member 18. This holder 2 1 extends through a suitable guide opening in the side of the frame 10 and into the frame extension 17, and has a close working fit in the main frame, being engaged on one side, by a gib 25, which may be adjusted to take up any wear. The holder is arranged so that the cutter 23 slides over the face of the die block 15, through which the stock is projected to be cut or sheared, as before stated.

The outer end of the holder is forked: or bifurcated, as shown most clearly in Figs. 4c and 5, and in the bifurcated end is fixed a rather heavy pin or stud 26, which may i be secured by means of a key 26 in suitably provided openings in the ends of the forked portion, and in caps 26 secured thereto. On an enlarged portion of the pin betweeirthe arms of the fork is journaled a roller. 27 which is located directly in line with the axis of the holder 24, and is directly opposite to and in position to be engaged by the larger cam 21, which on being reciprocated, moves the holder and cutter inwardly to shear the stock, the pressure of the cam being transmitted to the holder directly in line with the axis of the latter. The lower end of the pin 26 is somewhat decreased in size and projects below the lower bifurcation of theholder, and journaled on the lower end of the pin is a second and smaller roller 28 which is designed to retract or positively move outward the holder and the cutter.

It will be noted that the roller supporting pin 26 is fixed in the holder and. is not intended to be adjusted relative to the holder,

and smaller gib 30 being oppositethe cam 22. and roller 28.

\Vhen a, length of the stock is cut off, it is held between the cutter 23 and a finger 31 supported by apai'r of arms 32 and 33;"the

latter being connected tothe holder so as to reciprocate therewitlnand theformer being connected to the inner free end'of the arm 33 inithe manner shown in Fig. 4. This mechanism, however, forms no part of the present invention, and further illustration of" the same is believed to be. unnecessary. The

short piece of stock after it has been cut 7 off. is carried inwardly by the cutter and finger 31. until it is in line with. a second opening. 34:,and' withthetoolswhich are to operate on. the stock. that. any suitably shaped diemay be carried by the'die block so asto cooperate with the tool or punch l t to produce the d'esi'redTesults. j V I v lVith thisconstruction wherein the roller is in linewith the axis of, the holder 24;, itis impossible by the transmission of: pressure between the. cam and roller toetu'rn' or rock the holder so. as to affect the action of the cutter 23, and there is no. dangerof the holder being bent or of buckling, providing it is suitably,proportioned] Furthermore, by reason of the particular rollersupport and. because of the fact that adjustment of the cutter is accomplished by an adjustment of the cutter actuating slide, instead of the' roller, a' large and well constructed bearing may behad, which can not, be sheared or bent. By. this mechanism, stock of any size within reasonable limits can be out very effectively andcleanly.

Havingthus described my invention, what I claimis: I Y

1. In a metal working machine of the type It will be understood wherein stock is fed intothe machine and with twoeams, one adapted to engage the central. roller so as to move the holder inwardly, and the other to engage the second roller to retract the holder.

2. In a metal working machine of a type wherein stock is fed into the machine and cut into sections, a frame, a stock cutting mechanism comprising a reciprocating cutter, a sliding holder carrying the cutter, said holder having at its outer end two rollers, one located centrally or in alinement with the axis of the holder, and the other at the side of the holder, a slide provided with two cams, one of which is above the other and is adapted to engage the central roller so as to move the cutter and holder inwardly, and the other adapted to engage thev second roller to cause the cutter and holder to be retracted, a guideway for the 15 slide, including two adjustable gibs on opposite sides of the slide, one Opposite the upper central roller, and the other opposite the lower roller.

In testimony whereof, I hereunto affix my 20 signature in the presence of two Witnesses.

ROY H. SMITH.

Witnesses:

H. R. SULLIVAN, A. F. Kwis.

copies of this patent may be obtained for five cents each, by addressing the "Commissioner of Patenta,

Washington, D. C. 

